The beta version of the full hack is out! You can find the testing thread here.
Also, here's the final boss:

First, he's just walking on the rope. Then, he stars dropping icicles, then snowballs (hammers). When he has 1 HP, he throws several hammers. You also have to avoid the snowballs that freeze Mario, which are shot from the cannos.
I've also made some changes to the title screen:

It now has a border, with the graphics from the item box, and now shows Toad's house with Toad and Mario.
Along with that, I've also changed the overworld border:

The previous border was just the vanilla border with a light gray palette, so I changed it.


Also, here's the final boss:
First, he's just walking on the rope. Then, he stars dropping icicles, then snowballs (hammers). When he has 1 HP, he throws several hammers. You also have to avoid the snowballs that freeze Mario, which are shot from the cannos.
I've also made some changes to the title screen:

It now has a border, with the graphics from the item box, and now shows Toad's house with Toad and Mario.
Along with that, I've also changed the overworld border:

The previous border was just the vanilla border with a light gray palette, so I changed it.

